blood Flashcards
(23 cards)
how much is there in the body
5L
3 proteins found in plasma and functions
- albumin- transports fat soluble hormones and vitamins
- globulin
- fibrinogen- clotting
colloid oncotic pressure favous
movement into capillary
capillary hydrostatic pressure favours
(blood pressure)
movement out of capillary
what does low protein cause
decreased oncotic pressure
causes oedema- too little plasma fluid, too much ISF fluid
life span of RBC
120 days
hormone that makes RBC
erythropoietin
where does erythropoietin come from
15% from liver
85% from kidneys
what causes more erythropoietin (thus more RBC)
less O2
haemorrhage, anemia, cardiac dysfunction, lung disease
5 types of white blood cells
- neutrophils
- basophils
- eosinophils
- monocytes
- lymphocytes
formation of WBC is controlled by
cytokines- colony stimulating factor
from mature WBC
bacterial infections are fought with
neutrophils
viral infections are faught with
lymphocytes
where do platelets come from
bits off of megakaryocytes
life span of platelets
10 days
what controls production of platelets
erythropoietin
function of platelets
clotting
by attaching to damaged walls and exposed connective tissue
whats heamatocrit
measurement of RBC volume
ideal range of heamatocrit
40-50% of RBC in whole of blood
how does dehydration change heamatocrit
increase RBC percentage
viscosity: a 50% increase in haematocrit increases viscosity by
100%
viscosity: effect of temp
increase of temperature by 1oc
decreases viscosity by 2%
viscosity: effect of flow rate
decrease in flow rate
increases viscosity
(it gets thicker when its not moving)
